8 months ago I installed a 10kWh lithium iron phosphate solar battery beside my inverter, using 280ah eve cells in the pack. It was not a showroom project; I wanted to use more of my rooftop solar after sunset and stop buying expensive evening electricity from the grid.

Before the battery, I typically exported around 12–15kWh on sunny days, then pulled power back between 5pm and 10pm. My utility bill averaged about $145 a month. After setting the inverter to charge from solar and discharge during peak hours, it has usually landed between $80 and $100. The exact savings vary with weather and heating use, but roughly $40–$60 per month feels real. I also run the dishwasher, microwave, and washing machine from stored energy without thinking about it.

The best part is how ordinary the system feels now. By breakfast, the battery is often back above 80%, and by dinner it quietly carries most of the house load. I check the battery monitor maybe twice a week, rather than obsessing over live data.

I did have one minor troubleshooting scare. During a cloudy afternoon, the battery stopped discharging and the app showed “standby.” I first assumed something had failed, but the inverter had reached its low state-of-charge reserve. I had raised the reserve from 10% to 20% earlier that week, and it resumed normally after the next full solar charge. That small lesson made me appreciate having a backup reserve instead of chasing every last watt.

My current setup is grid-tied with battery backup for the refrigerator, internet, and a few lights during outages. It is not completely energy independent, and winter production will be weaker, but the solar battery has already changed how I use electricity. Payback is a long game, but monthly savings make it worthwhile.